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| author | Melanie Blower <melanie.blower@intel.com> | 2021-06-09 11:38:34 -0400 |
|---|---|---|
| committer | Melanie Blower <melanie.blower@intel.com> | 2021-06-28 12:26:53 -0400 |
| commit | 4f1238e44d803b145997fa984677a6c5cdf1f417 (patch) | |
| tree | 24f4ae7bc9027d11ff6b3938360468d098078640 /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | 2c02b0c3f45414ac6c64583e006a26113c028304 (diff) | |
| download | llvm-4f1238e44d803b145997fa984677a6c5cdf1f417.zip llvm-4f1238e44d803b145997fa984677a6c5cdf1f417.tar.gz llvm-4f1238e44d803b145997fa984677a6c5cdf1f417.tar.bz2 | |
[clang][patch][fpenv] Add builtin __arithmetic_fence and option fprotect-parens
This patch adds a new clang builtin, __arithmetic_fence. The purpose of the
builtin is to provide the user fine control, at the expression level, over
floating point optimization when -ffast-math (-ffp-model=fast) is enabled.
The builtin prevents the optimizer from rearranging floating point expression
evaluation. The new option fprotect-parens has the same effect on
parenthesized expressions, forcing the optimizer to respect the parentheses.
Reviewed By: aaron.ballman, kpn
Differential Revision: https://reviews.llvm.org/D100118
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions